/*      $NetBSD: clocktime.c,v 1.3 2024/08/18 20:47:26 christos Exp $   */

#include "config.h"

#include "ntp_calendar.h"
#include "ntp_stdlib.h"

#include "unity.h"
#include "test-libntp.h"

void setUp(void);
void tearDown(void);
void test_CurrentYear(void);
void test_CurrentYearFuzz(void);
void test_TimeZoneOffset(void);
void test_WrongYearStart(void);
void test_PreviousYear(void);
void test_NextYear(void);
void test_NoReasonableConversion(void);
int isLE(u_int32 diff,u_int32 actual);
void test_AlwaysInLimit(void);


/* ---------------------------------------------------------------------
* test fixture
*
* The clocktimeTest uses the NTP calendar feature to use a mockup
* function for getting the current system time, so the tests are not
* dependent on the actual system time.
*/

void
setUp(void)
{
       ntpcal_set_timefunc(timefunc);
       settime(2000, 1, 1, 0, 0, 0);

       return;
}

void
tearDown(void)
{
       ntpcal_set_timefunc(NULL);

       return;
}

/* ---------------------------------------------------------------------
* test cases
*/

void
test_CurrentYear(void)
{
       /* Timestamp: 2010-06-24 12:50:00Z */
       const u_int32 timestamp = 3486372600UL;
       const u_int32 expected  = timestamp; /* exactly the same. */

       const int yday=175, hour=12, minute=50, second=0, tzoff=0;

       u_long yearstart = 0;
       u_int32 actual;

       TEST_ASSERT_TRUE(clocktime(yday, hour, minute, second, tzoff,
                                  timestamp, &yearstart, &actual));
       TEST_ASSERT_EQUAL(expected, actual);

       return;
}

void
test_CurrentYearFuzz(void)
{
       /*
        * Timestamp (rec_ui) is: 2010-06-24 12:50:00
        * Time sent into function is 12:00:00.
        *
        * Since the fuzz is rather small, we should get a NTP
        * timestamp for the 12:00:00 time.
        */

       const u_int32 timestamp = 3486372600UL; /* 2010-06-24 12:50:00Z */
       const u_int32 expected  = 3486369600UL; /* 2010-06-24 12:00:00Z */

       const int yday=175, hour=12, minute=0, second=0, tzoff=0;

       u_long yearstart=0;
       u_int32 actual;

       TEST_ASSERT_TRUE(clocktime(yday, hour, minute, second, tzoff,
                                  timestamp, &yearstart, &actual));
       TEST_ASSERT_EQUAL(expected, actual);

       return;
}

void
test_TimeZoneOffset(void)
{
       /*
        * Timestamp (rec_ui) is: 2010-06-24 12:00:00 +0800
        * (which is 2010-06-24 04:00:00Z)
        *
        * Time sent into function is 04:00:00 +0800
        */
       const u_int32 timestamp = 3486369600UL;
       const u_int32 expected  = timestamp;

       const int yday=175, hour=4, minute=0, second=0, tzoff=8;

       u_long yearstart=0;
       u_int32 actual;

       TEST_ASSERT_TRUE(clocktime(yday, hour, minute, second, tzoff, timestamp,
                                                 &yearstart, &actual));
       TEST_ASSERT_EQUAL(expected, actual);
}

void
test_WrongYearStart(void)
{
       /*
        * Timestamp (rec_ui) is: 2010-01-02 11:00:00Z
        * Time sent into function is 11:00:00.
        * Yearstart sent into function is the yearstart of 2009!
        */
       const u_int32 timestamp = 3471418800UL;
       const u_int32 expected  = timestamp;

       const int yday=2, hour=11, minute=0, second=0, tzoff=0;

       u_long yearstart = 302024100UL; /* Yearstart of 2009. */
       u_int32 actual;

       TEST_ASSERT_TRUE(clocktime(yday, hour, minute, second, tzoff, timestamp,
                                                 &yearstart, &actual));
       TEST_ASSERT_EQUAL(expected, actual);
}

void
test_PreviousYear(void)
{
       /*
        * Timestamp is: 2010-01-01 01:00:00Z
        * Time sent into function is 23:00:00
        * (which is meant to be 2009-12-31 23:00:00Z)
        */
       const u_int32 timestamp = 3471296400UL;
       const u_int32 expected  = 3471289200UL;

       const int yday=365, hour=23, minute=0, second=0, tzoff=0;

       u_long yearstart = 0;
       u_int32 actual;

       TEST_ASSERT_TRUE(clocktime(yday, hour, minute, second, tzoff, timestamp,
                                                 &yearstart, &actual));
       TEST_ASSERT_EQUAL(expected, actual);
}

void
test_NextYear(void)
{
       /*
        * Timestamp is: 2009-12-31 23:00:00Z
        * Time sent into function is 01:00:00
        * (which is meant to be 2010-01-01 01:00:00Z)
        */
       const u_int32 timestamp = 3471289200UL;
       const u_int32 expected  = 3471296400UL;

       const int yday=1, hour=1, minute=0, second=0, tzoff=0;
       u_long yearstart = 0;
       u_int32 actual;

       TEST_ASSERT_TRUE(clocktime(yday, hour, minute, second, tzoff,
                                  timestamp, &yearstart, &actual));
       TEST_ASSERT_EQUAL(expected, actual);

       return;
}

void
test_NoReasonableConversion(void)
{
       /* Timestamp is: 2010-01-02 11:00:00Z */
       const u_int32 timestamp = 3471418800UL;

       const int yday=100, hour=12, minute=0, second=0, tzoff=0;
       u_long yearstart = 0;
       u_int32 actual;

       TEST_ASSERT_FALSE(clocktime(yday, hour, minute, second, tzoff,
                                   timestamp, &yearstart, &actual));

       return;
}


int/*BOOL*/
isLE(u_int32 diff,u_int32 actual)
{

       if (diff <= actual) {
               return TRUE;
       }
       else return FALSE;
}


void
test_AlwaysInLimit(void)
{
       /* Timestamp is: 2010-01-02 11:00:00Z */
       const u_int32 timestamp = 3471418800UL;
       const u_short prime_incs[] = { 127, 151, 163, 179 };
       int     cyc;
       int     yday;
       u_char  whichprime;
       u_short ydayinc;
       int     hour;
       int     minute;
       u_long  yearstart;
       u_int32 actual;
       u_int32 diff;

       yearstart = 0;
       for (cyc = 0; cyc < 5; cyc++) {
               settime(1900 + cyc * 65, 1, 1, 0, 0, 0);
               for (yday = -26000; yday < 26000; yday += ydayinc) {
                       whichprime = abs(yday) % COUNTOF(prime_incs);
                       ydayinc = prime_incs[whichprime];
                       for (hour = -204; hour < 204; hour += 2) {
                               for (minute = -60; minute < 60; minute++) {
                                       clocktime(yday, hour, minute, 30, 0,
                                                 timestamp, &yearstart,
                                                 &actual);
                                       diff = actual - timestamp;
                                       if (diff >= 0x80000000UL)
                                               diff = ~diff + 1;
                                       TEST_ASSERT_TRUE(isLE(diff, (183u * SECSPERDAY)));
                               }
                       }
               }
       }
       return;
}

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